Questions tagged [hdmi]

HDMI stands for High Definition Multimedia Interface. Along with the Composite RCA, HDMI is one of the devices' two video outputs. It provides high quality digital video.

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18 views

Incorrect Display Resolution if display started after Pi

If I start my 7" display (resolution of 800×480) before I boot my Raspberry pi, the resolution/display is perfect, however if I have my display powered by my raspberry pi, it seems to display ...
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16 views

Pi keeps changing source

I have a problem with my Pi. Every time I turn on the TV it automatically changes the source to my Pi. I tried following this thread : stopping RaspPi / raspbmc from auto changing source on tv ...
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20 views

Broadcast a message from a background job so that it appears on all sessions including the login screen

I'm running a python program as a background job, started by systemd on boot. From this background job, I would like to print messages to the login screen (the screen that's visible on the HDMI output ...
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15 views

cec controlling other cec enabled device (not TV) - controlling Fire TV from pi

I have a pi connected to the TV and can successfully power on, power off, and change sources on tv with: echo "on 0" | cec-client -s #turn off echo "standby 0" | cec-client -s #...
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Raspberry Pi3B is new. I am using it as a companion computer for my ROV together with my FC

on my second test while testing the pi with a usb camera, HDMI connected, ethernet cable linked to my laptop and micro USB hooked up for power which is similar to my other ROV setup. On this boot up i ...
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1answer
71 views

Raspberry Pi 400 video issues with older DVI monitors

I have a strange problem trying to get a Raspberry Pi 400 to display on two older monitors, an HP LP2065 and a Samsung SyncMaster 214t. Both are mid-2000s 1600x1200 monitors with DVI inputs. With both,...
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1answer
37 views

Second Acer monitor X183H native 1366 x 768 HDMI-to-VGA adapters “Input Not Supported” (*First AcerG195W works great)

#Raspberry Pi w/ latest raspbian (RaspberryOS) (which I have connected as a desktop computer) https://www.raspberrypi.org/products/raspberry-pi-4-model-b/specifications/?resellerType=home #Connection ...
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Display monitor closes while running a python code on Rpi zero

I am writing a code using the Google AIY vision kit and its APIs. I have a loop which calls the face_detection model continuously every 30 secs. The loop works perfectly fine for the first 2 ...
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32 views

Raspberry pi 4 not being able to output to 4k

Hey so I recently got back into doing some projects with my raspberry pi, I mostly just do stuff with networking and the such, but I wanted to try to get the raspberry pi to display to 4k TV, I'm ...
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16 views

Sound not working properly or consistent

I have a Pi 3b+ and having issues with sound. I have tried raspi-config as well as altering the config.txt for HDMI2. First I was getting sound when playing file throught VLC using headphone jack but ...
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How to do pass through from USB to HDMI in Raspberry Pi Zero W

Is it possible to pass through from USB to HDMI in Raspberry Pi Zero W? I need to pass through video/data from my laptop to TV Monitor through Raspberry Pi Zero W while capturing passed data in ...
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Powering HDMI splitter from Raspberry Pi Zero W

I have a base zero W that I want to turn into a receiver for spotify connect and some old speakers that connect via a 3.5mm jack. I want to get audio out of it that isn't horrific sounding (such as $5 ...
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Raspberry Pi hdmi black screen (SSH works fine)

My raspberry pi will boot fine and I can access via SSH however when connected to HDMI it is just a black screen that appears. I notice that the display screen resolutions are alternating back and ...
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2answers
58 views

How to enable HDMI on Rasberry Pi 4

This topic may be misleading. Let me clarify. I need to enable HDMI on my new raspberry Pi 4 (I am a new user to pi). This is accomplished by changing one line in /boot/config.txt. This is posted in ...
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HDMI-to-( TTL or LVDS ) decoder/driver on a custom PCB [closed]

I am working on a custom-made handheld PCB based around a PI Compute Module and one of the hardest steps I have found is how to include an HDMI-to-(50pin-TTL or LVDS) driver on my PCB to run my LCD ...
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Rotating the display causing low fps

I've been working on a project that uses a 1200x1920 display but in the landscape format and it's certainly been one heck of a journey. I've edited the config file hundreds of times in dozens of ...
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71 views

Turn off LG TV with HDMI-CEC (Fire Stick can do it on the same TV)

I'm trying to turn off an LG TV with Raspberry PI 4, with LibreELEC. I've seen multiple references saying LG TV does not support standby using HDMI-CEC. And looks like the case with my TV as well. I'm ...
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1answer
52 views

Assign an app interface to a specific HDMI output

I am new to Pi but have a solid tech background. Just received my Raspberry Pi 4b, 2gb. I have photos in 2 separate directories and would like to run 2 separate instances of an application and direct ...
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53 views

Disable HDMI port on Ubuntu 18.04

I'm running Ubuntu 18.04 on an RPI 3 B+, and I would like to disable HDMI to conserve power. tvservice seems to be missing, is there any way to do this if I'm not running raspbian?
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1answer
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Pioneer TV shows “unsupported” when connected to RPI 4

When I connect my 2GB RAM Raspberry Pi 4 (running 64-bit Ubuntu-Mate 20.04) to my Pioneer LED-42K200D, the TV shows "unsupported", which I infer as referring to the signal format. I've tried ...
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1answer
147 views

Show desktop on boot without HDMI cable

I'm using vnc viewer for my pi 4 and it says 'cannot currently show desktop', because, from what I assume, is the fact that if it doesn't have an HDMI connection when it boots, it won't show the ...
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9 views

Audio output is changing after I exit the ssh session

My RPi2 has both HDMI and jack output audios. I would like to use always only the jack output. If I connect via SSH to the pi and select the output in alsamixer (using F6), I can activate the audio ...
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68 views

vlc python does not play a video in hdmi2

I want to run a video in my second monitor/projector using vlc pip3 install python-vlc and python3 in Raspberry Pi 4. I set the Fullscreen Video Device to HDMI-2 Tools --> Preferences --> Video -...
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1answer
39 views

3.5" LCD driver conflicts with UART

I'm using RPi Zero W with 3.5" LCD driver ( here ). Everything works well except the UART. Linux console is disabled and UART is enabled. When video output is on HDMI port, I can send and receive ...
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1answer
46 views

rPi4 no longer capable of HDMI output. Eeprom recovery did not help

I have a rPi 4 that died on me, in two stages: First it would only show a yellow screen on HDMI outputs. Then later, it completely stopped outputting HDMI altogether. It seems to be in a reboot loop? ...
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39 views

Booting from HDMI

I was wondering if it's possible that you can boot a RaspberryPI from a HDMI. We want to place one behind and connected to TV. Is there a way that it is able to boot if the HDMI port source is select ...
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1answer
106 views

Raspberry Pi 4b HDMI inconsistancy [duplicate]

Just doing some testing for a project. The project involves two SBCs right now(one is the Raspberry Pi 4b). I have one TV handy so I had the other SBC connected initially. For reasons pertaining to ...
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2answers
54 views

HDMI port won't work on Raspberry Pi

I'm pretty new to raspberry pi, and it always used to work fine, but I've got a new monitor, the BenQ GW2270, and I set my raspberry pi 4 up using the micro-hdmi to my monitor's hdmi port, and when I ...
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62 views

No audio from HDMI, Bluetooth, or Jack port (Raspberry Pi 4B)

new user here. Finally got around to using my raspberry pi 4B this week and I'm having troubles getting audio from all 3 methods mentioned in the title. I've researched here and there for hours about ...
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37 views

Raspberry pi 4 does not show on HDMI Monitor or TV

I have a Raspberry Pi 4 and have not managed to get a display on it through HDMI. I have tried 3 different cables, a standard HDMI to HDMI with a connection adapter, a new cable specifically for the ...
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2answers
77 views

Monitor only recognises the signal when started first

My monitor, an old Toshiba 47wlg66, will display what my boards output (whether it's my old raspberry pi 1 A or new raspberry pi 4 B) only if it was powered first. Otherwise it will remain black.. It ...
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164 views

RPI4 Model B won't boot Kali Linux, TV shows “No Signal” or Rainbow screen

I have RPI4 model B and I've installed Kali Linux Kali Linux RaspberryPi 2, 3 and 4 on my SDcard 64gb through Balena Etcher but when powered on, my LG tv shows "no signal", HDMI is well ...
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38 views

pi 3 B+ running ubuntu 20.04 turn off HDMI USB

I have my pi 3 B+ running with ubuntu 20.04. I have a headless system without any peripherals connected. i currently have my ethernet connection only. How to turn off unused HDMI,USB [leaving one] etc ...
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1answer
39 views

Blue screen over VGA monitor connected to Pi

I recently bought new raspberry pi 4 2GB and micro hdmi to vga converter. Once i try to connect pi to monitor using converter, os boots perfectly, but over whole monitor screen is light blue color ...
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161 views

Raspberry Pi 4 not recognised by KVM switch

I have recently been given a PWAY 4 way KVM switch (Model PW-SH0401B) so I can use one screen/mouse/keyboard with 4 Raspberry Pi I am using for some research work. Although it works when I attach my ...
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26 views

No Custom Horizontal Resolution Below 800?

On my RPI 3 I can edit /boot/config.txt and use this to get my desired resolution of 400x200. hdmi_group=2 hdmi_mode=87 hdmi_cvt=400 200 60 6 0 0 0 hdmi_drive=1 However on my 3B+ it results in a ...
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157 views

Raspberry PI 4b HDMI no signal

I have a problem with my new Raspberry PI 4B and an old Panasonic TV (TX-P46G10E). It seems there is no signal through my HMDI. But if I test it with a computer display (4K) it works correctly. Before ...
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2answers
27 views

RPi 4b hdmi signal only works from if plugged in from system start up

It seems like I can never get the screen to show anything through HDMI unless it is plugged in from system boot. I find it hugely frustrating not being able to just switch HDMI in and out. Is that to ...
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1answer
54 views

How do you run Adafruit PiTFT - 320x240 without mirroring the HDMI output

I currently have a Adafruit PiTFT - 320x240 mirroring the raspberry pis HDMI output. I have developed a GUI which I would like to run on the raspberry pi, which is designed for 320x240. The problem is ...
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2answers
74 views

RPi4 doesn’t output through HDMI extender cable

I’ve got a Raspberry Pi 4 running Raspberry Pi OS, an HDMI monitor, and a female-male HDMI panel mount cable connected to an HDMI-micro HDMI adapter. When I hook my monitor up to the extension cable, ...
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156 views

Raspberry Pi 4 7inch HDMI touchscreen issues

I am using 7 inch HDMI touch screen with Raspberry Pi 4. I am having below issues: I have connected the HDMI cable to the touchscreen and connected the mini hdmi to hdmi0 of pi. I have also connected ...
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1answer
50 views

Raspberry pi Touchscreen CSI to HDMI extension

I need to connect my raspberry pi 7 inch touchscreen to my raspberry pi board from a distance of 5m, so I bought some CSI/HDMI extensions that seem to work great with a 1m cable, but when I try o ...
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43 views

RasPi4 shows two connected screens even though there is only one

So I'm currently building my Smartmirror with Magic Mirror and I have some problems with the screen configuration of my Raspberry Pi 4 running Raspbian Buster. I tried changing the screen orientation ...
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139 views

No HDMI output when the monitor is turned off at boot (no signal)

I am using Magic Mirror together with my Raspberry Pi 3B+ (Buster) and an old laptop monitor. The website is displayed using kiosk mode with chromium. When my RPi normally starts, the monitor is ...
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27 views

practical RAM recommendation for RaspBian web browser? (2Gbytes or 4GBytes)

I am considering using some RaspBerry model for an Linux system which would be occasionally used to browse the web. Let's assume I just want to run a recent Firefox (e.g. 68) with half a dozen of web ...
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1answer
32 views

Re-establishing SSH without VNC, HDMI

My Raspi has suddenly stopped working with VNC viewer, HDMI, and SSH (which is enabled). Before this happened, I connected via SSH, and added the Raspi to my home network as well as VNC viewer. My ...
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25 views

Raspery pi don't display

I have relay connected to my light switch in the corridor, when i close the circuit light and LCD monitor turn ON, like on the following example 230 V | | / ...
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2answers
507 views

Display settings for a TV with resolution of 1366x768 @60 Hz used RPI 4B_4GB

My display is a TV with resolution of 1366x768 @60 Hz. It has HDMI input option as well as PC input option. I prefer HDMI input but I'm not getting the appropriate image of RPI 4B with 4GB with HDMI. ...
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19 views

LibreELEC_RPi4 (System.tar.xz) unzipped changes to config.txt

trying to connect Pi4 to a Hitachi TV (pretty old - mid 2000's), however it has the HDMI port. So my Pi4 is connected. SD card is with OS's on it (NOOBS). Any idea why Pi4 is not booting up? I have ...
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1answer
103 views

Connect Pi4 to TV Hitachi (mid 2000's) HDMI

trying to connect Pi4 to a Hitachi TV (pretty old - mid 2000's), however it has the HDMI port. So my Pi4 is connected. SD card is with OS's on it. Any idea why Pi4 is not booting up? I have ...

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